JP6962736B2 - Heat transfer device - Google Patents

Description

The present application relates to a heat transfer device (magnetic refrigerator) utilizing the magnetic heat quantity effect.

For example, in the magnetic refrigerator described in Patent Document 1, a rotor having a permanent magnet is rotated, and a heat transfer fluid is circulated in each of a duct whose temperature has decreased by degaussing and a duct whose temperature has increased by excitation. As a result, the heat on the heat absorbing side is moved to the heat radiating side.

Japanese Unexamined Patent Publication No. 2013-204988

In the invention described in Patent Document 1, since a pump (including a blower) for circulating the heat transfer fluid is separately required, the configuration of the heat transfer device becomes complicated. In view of the points on the left, the present application discloses an example of a heat transfer device capable of having a simple configuration.

The heat transfer device is an impeller (20) having at least a part made of a magnetic material, and has an impeller (20) having a plurality of blades (21) extending radially outward from the center of rotation, and an impeller. Rotation of the impeller (20) with a casing (30) constituting the pump chamber (31) for rotatably accommodating (20) and a heat transfer fluid provided in the casing (30) and absorbing heat on the heat absorbing side. A heat absorbing side suction portion (32) for guiding to the center side and a heat radiating side provided on the casing (30) for guiding the heat transport fluid that has released heat on the heat radiating side to the rotation center side of the impeller (20). A suction unit (33) and a heat absorption side discharge unit (34) provided on the casing (30) for discharging the heat transfer fluid flowing out from the outside in the radial direction with the rotation of the impeller (20) to the heat absorption side. , A heat-dissipating side discharge unit (35) provided in the casing (30) for discharging the heat-conveying fluid flowing out from the radial outside with the rotation of the impeller (20) to the heat-dissipating side, and a pump chamber (31). Of these, a magnetic field generator (40) that generates a magnetic field is provided in a space communicating with the heat dissipation side discharge portion (35) side.

Then, when the space in the pump chamber (31) where the magnetic field is formed is defined as the magnetic field space (A1) and the space in the pump chamber (31) where the magnetic field is not formed is defined as the non-magnetic space (A2), the heat radiation side. The suction unit (33) is configured so that the heat transfer fluid sucked into the pump chamber (31) flows out to the heat dissipation side discharge unit (35) via the magnetic field space (A1), and further, heat absorption. The side suction unit (32) is configured so that the heat transfer fluid sucked into the pump chamber (31) flows out to the heat absorption side discharge unit (34) side via the non-magnetic space (A2). Is desirable.

As a result, it functions as a "refrigerator that transfers heat from the heat transfer fluid that absorbs heat on the endothermic side to the heat transfer fluid that releases heat on the heat dissipation side" and as a "pump that circulates the heat transfer fluid". It is possible to obtain a device having the above functions. As a result, it is possible to obtain a heat transfer device that can have a simple configuration.

Further, the heat radiating fluid and the endothermic fluid can be circulated while suppressing the heat radiating fluid and the endothermic fluid from being mixed in the heat transfer device. As a result, it is possible to efficiently transfer the heat on the endothermic side to the heat dissipation side. The endothermic fluid is a heat transfer fluid that has absorbed heat on the endothermic side. The heat-dissipating fluid refers to a heat-conveying fluid that releases heat on the heat-dissipating side.

Incidentally, the reference numerals in the parentheses are examples showing the correspondence with the specific configurations and the like described in the embodiments described later, and the present invention is limited to the specific configurations and the like shown in the symbols in the parentheses. It's not something.

It is a figure which shows the air conditioner which concerns on 1st Embodiment of this invention. It is a figure which shows the heat transfer apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the structure of the central cross section of the heat transfer apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the feature of the heat transfer apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the feature of the heat transfer apparatus which concerns on 2nd Embodiment of this invention. It is a figure which shows the air-conditioning apparatus which concerns on other embodiment of this invention. It is a figure which shows the magnetic material part which concerns on other embodiment of this invention.

The "embodiment of the invention" described below is an example of an embodiment belonging to the technical scope of the present invention. That is, the matters specifying the invention described in the claims are not limited to the specific configuration, structure, etc. shown in the following embodiments.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The arrows and the like indicating the directions attached to each figure are described in order to make it easier to understand the relationship between each figure. The present invention is not limited to the directions attached to each figure.

At least one member or part described with a reference numeral is provided unless otherwise specified such as "one". That is, if there is no notice such as "one", two or more of the members may be provided.

(First Embodiment)
1. 1. Outline of Air Conditioning Device In the present embodiment, the present invention is applied to an air conditioner device that cools (air-conditioning) a room. The air conditioner cools the room by dissipating heat from the room to the outside. The air conditioner according to the present embodiment performs air conditioning to maintain the temperature in the server room in which the heating element such as the ICT device is installed within a predetermined range.

As shown in FIG. 1, the air conditioner 1 includes an indoor heat exchanger 3, an outdoor heat exchanger 5, a heat transfer device 10, and the like. The indoor heat exchanger 3 exchanges heat between the air in the server room and a liquid such as water (hereinafter, referred to as a heat transfer fluid). That is, the indoor heat exchanger 3 absorbs heat from the indoor air.

The outdoor heat exchanger 5 exchanges heat between the outdoor air and the heat transfer fluid. That is, the outdoor heat exchanger 5 dissipates heat to the outdoor air. Therefore, in the present embodiment, the indoor (indoor heat exchanger 3) side is the endothermic side, and the outdoor (outdoor heat exchanger 5) side is the heat dissipation side.

The heat transfer device 10 transfers heat from a heat transfer fluid that absorbs heat on the endothermic side (hereinafter, referred to as an endothermic fluid) to a heat transfer fluid that releases heat on the heat dissipation side (hereinafter, referred to as a heat dissipation fluid). It is a device that has both a function as a refrigerator and a function as a pump that circulates a heat transfer fluid. When the endothermic fluid and the heat radiating fluid are generically referred to, they are referred to as a heat transport fluid.

2. Configuration of heat transfer device 2.1 Outline of heat transfer device As shown in FIGS. 2 and 3, the heat transfer device 10 includes at least an impeller 20, a casing 30, a magnetic field generator 40, and the like. The impeller 20 has a plurality of blades 21 as shown in FIG.

Each blade 21 extends radially outward from the rotation center side of the impeller 20. Each blade 21 according to this embodiment is composed of rearward facing blades. The blade 21 may be composed of radial blades or forward-facing blades.

As shown in FIG. 3, the space between the adjacent blades 21 is partitioned into a plurality of spaces 22 in the direction of the rotation axis (vertical direction on the paper surface). The partition material 23 that partitions each space 22 is made of a ferromagnetic material such as an electromagnetic steel plate. That is, a part of the impeller 20 is made of a magnetic material.

The electric motor 24 generates a rotational force that rotates the impeller 20. As shown in FIG. 2, the casing 30 constitutes a pump chamber 31 that rotatably houses the impeller 20. The casing 30 has an endothermic side suction unit 32, a heat dissipation side suction unit 33, an endothermic side discharge unit 34, a heat dissipation side discharge unit 35, and the like.

The endothermic side suction unit 32 is a portion for guiding the endothermic fluid to the rotation center side of the impeller 20. The heat radiating side suction unit 33 is a portion for guiding the heat radiating fluid to the rotation center side of the impeller 20. The endothermic side suction unit 32 and the heat dissipation side suction unit 33 are partitioned by a partition member 36.

When the impeller 20 rotates, the heat transfer fluid guided to the rotation center side circulates radially outward from the rotation center side in the plurality of spaces 22 and is discharged from the impeller 20. That is, the heat transfer device 10 exerts a centrifugal pump function of discharging the heat transfer fluid outward in the radial direction.

The endothermic side discharge unit 34 is a discharge unit for discharging the heat transfer fluid flowing out from the radial outside of the impeller 20 to the endothermic side (indoor heat exchanger 3 side) as the impeller 20 rotates. The heat dissipation side discharge unit 35 is a discharge unit for discharging the heat transfer fluid flowing out from the radial outside of the impeller 20 to the heat dissipation side (outdoor heat exchanger 5 side) as the impeller 20 rotates.

Therefore, the casing 30 is configured in a spiral shape in which the heat transport fluid discharged from the impeller 20 is collected and guided to the endothermic side discharge port 34A and the heat dissipation side discharge port 35A. In other words, the heat transfer device 10 is configured like a centrifugal pump.

The magnetic field generator 40 generates a magnetic field in a part of the pump chamber 31. As shown in FIG. 2, the magnetic field generator 40 according to the present embodiment generates a magnetic field in a space of approximately 1/2 of the pump chamber 31. The magnetic field generator 40 is composed of an electromagnet or a permanent magnet (in this embodiment, an electromagnet).

Hereinafter, the space A1 (the shaded portion of the alternate long and short dash line) in the pump chamber 31 in which the magnetic field is formed is referred to as the magnetic field space A1. The space A2 (the portion where the alternate long and short dash line is not shaded) in the pump chamber 31 where the magnetic field is not formed is referred to as the non-magnetic field space A2.

The magnetic field space A1 communicates with the heat dissipation side discharge port 35A connected to the heat dissipation side (outdoor heat exchanger 5 side). The non-magnetic field space A2 communicates with the endothermic side discharge port 34A connected to the endothermic side (indoor heat exchanger 3 side).

That is, the magnetic field space A1 is a range of the impeller 20 that is connected to the heat dissipation side discharge portion 35 within a range of approximately 180 degrees from the rotation center side. The non-magnetic field space A2 is a range of the impeller 20 that is connected to the endothermic side discharge portion 34 within a range of approximately 180 degrees from the rotation center side.

2.2 Positions of the heat-dissipating side suction part and the heat-absorbing side suction part (see Fig. 4)
The heat radiating side suction unit 33 is configured such that the heat transport fluid (heat radiating fluid) sucked into the pump chamber 31 flows out from the heat radiating side discharge unit 35 via the magnetic field space A1. The endothermic side suction unit 32 is configured such that the heat transport fluid (endothermic fluid) sucked into the pump chamber 31 flows out from the heat absorption side discharge unit 34 via the non-magnetic field space A2.

That is, the heat transfer fluid flows from the rotation center side toward the outer edge of the impeller 20 while moving in the direction of rotation of the impeller 20 together with the impeller 20 as the impeller 20 rotates. Hereinafter, "movement of the heat transfer fluid in the direction of rotation of the impeller 20" is simply referred to as "movement".

Therefore, for example, the heat-dissipating fluid that has flowed into the pump chamber 31 from the heat-dissipating side suction unit 33 may move to the non-magnetic field space A2 and be discharged from the heat-absorbing side discharge unit 34. Similarly, the endothermic fluid that has flowed into the pump chamber 31 from the endothermic suction unit 32 may move to the magnetic field space A1 and be discharged from the heat dissipation side discharge unit 35.

Therefore, in the present embodiment, the inclination angle θ of the partition member 36 with respect to the boundary line Lo between the magnetic field space A1 and the non-magnetic field space A2 is set to an angle satisfying the following (a) and (b).
(A) The heat-dissipating fluid sucked into the pump chamber 31 flows out from the heat-dissipating side discharge unit 35.

(B) The endothermic fluid sucked into the pump chamber 31 flows out from the endothermic side discharge unit 34.
That is, the partition member 36 flows into the pump chamber 31 from the heat-dissipating side suction unit 33 that has flowed into the pump chamber 31 from the vicinity of the endothermic-side suction unit 32, and from the heat-absorbing side suction unit 32 that has flowed into the pump chamber 31 from the heat-dissipating side suction unit 33. The inclination angle θ is set so that the endothermic fluid flows as shown by the broken line in FIG.

3. 3. Features of the heat transfer device and the air conditioner according to the present embodiment The heat transfer device 10 is a refrigerator that transfers heat from a heat transfer fluid that absorbs heat on the endothermic side to a heat transfer fluid that releases heat on the heat dissipation side. And the function as a pump that circulates the heat transfer fluid. Therefore, it is possible to obtain a heat transfer device that can have a simple configuration.

That is, the portion of the impeller 20 located in the magnetic field space A1 releases heat. The portion of the impeller 20 located in the non-magnetic field space A2 absorbs heat. That is, the heat radiated in the magnetic field space A1 is the heat absorbed in the non-magnetic field space A2.

The heat absorbed in the non-magnetic field space A2 is the heat of the endothermic fluid, that is, the heat of the indoor air absorbed by the indoor heat exchanger 3. The temperature of the heat transport fluid flowing out from the heat radiating side discharge unit 35 (heat radiating side discharge port 35A) is higher than the temperature of the heat radiating fluid due to the heat radiated in the magnetic field space A1.

Therefore, since the heat transfer fluid having a temperature higher than the temperature of the outdoor air flows into the outdoor heat exchanger 5, heat is released from the outdoor heat exchanger 5 to the outdoor air. That is, in the present embodiment, since the heat transfer fluid heated and heated by the heat transfer device 10 flows into the outdoor heat exchanger 5, the heat in the room can be reliably released to the outside.

The heat-dissipating side suction unit 33 is configured so that the heat-dissipating fluid sucked into the pump chamber 31 flows out from the heat-dissipating side discharge unit 35, and the endothermic-side suction unit 32 is the endothermic fluid sucked into the pump chamber 31. Is configured to flow out from the endothermic side discharge unit 34.

Therefore, the heat radiating fluid and the endothermic fluid can be circulated while suppressing the heat radiating fluid and the endothermic fluid from being mixed in the heat transfer device 10. As a result, even when the heat load is large and the circulation flow rate is large, the heat on the endothermic side can be transferred to the heat dissipation side with high flow rate efficiency.

(Second Embodiment)
In the above-described embodiment, the inclination angle θ of the partition member 36 is fixed. On the other hand, as shown in FIG. 5, the present embodiment is provided with an actuator (in this embodiment, an electric motor) 36A that changes the inclination angle θ of the partition member 36 according to the rotation speed of the impeller 20. ing.

The operation of the actuator 36A is controlled by a control unit (not shown). For example, the control unit controls the operation of the actuator 36A so that the rotation angle of the actuator 36A, that is, the inclination angle θ increases as the rotation speed of the impeller 20 increases.

As a result, even when the rotation speed of the impeller 20, that is, the flow rate of the heat transfer fluid fluctuates, the heat radiation fluid is suppressed from being mixed in the heat transfer device 10. And the endothermic fluid can be circulated.

Since the same configuration requirements and the like as those in the above-described embodiment are designated by the same reference numerals as those in the above-described embodiment, duplicate description will be omitted.
(Other embodiments)
In the above-described embodiment, the heat transfer device 10 is applied to an air conditioner that cools (air-conditions) the room using outdoor air as a cooling heat source. However, the invention disclosed in the present specification is not limited to this.

That is, for example, it can be applied to an air conditioner that heats (air-conditions) the room by using outdoor air as a heat source, or a heat utilization device other than the air conditioner. Note that FIG. 6 is an air conditioner 1 capable of switching between cooling operation and heating operation. The switching valve 50 is a valve for switching the flow of the heat transfer fluid.

In the above embodiment, a liquid (incompressible fluid) was used as the heat transfer fluid. However, the invention disclosed in the present specification is not limited to this. That is, a gas such as air (compressible fluid) may be used as the heat transfer fluid. That is, it may be an air conditioner in which indoor air and outdoor air are heat-exchanged by the heat transfer device 10 without using a liquid.

In the above-described embodiment, the magnetic material portion of the impeller 20 is composed of a plate-shaped partition member 23. However, the invention disclosed in the present specification is not limited to this. That is, for example, as shown in FIG. 7, the magnetic material portion may be composed of a rod-shaped magnetic material 23A extending from the suction portion 32 side to the outer edge side.

The air conditioner 1 according to the above-described embodiment has a configuration including one heat transfer device 10. However, the invention disclosed in the present specification is not limited to this. That is, it may be an air conditioner 1 including a plurality of heat transfer devices 10.

In the above-described embodiment, the magnetic field space A1 and the non-magnetic field space A2 are alternately provided within a range of approximately 180 degrees. However, the invention disclosed in the present specification is not limited to this. That is, as long as the magnetic field space A1 and the non-magnetic field space A2 are provided alternately, two or more magnetic field spaces A1 and two or more non-magnetic field spaces A2 may be provided.

The magnetic field space A1 according to the above-described embodiment is set in the entire range from the central side of the impeller 20 to the outer edge portion. However, the invention disclosed in the present specification is not limited to this. That is, for example, the structure may be such that only the outer edge portion side of the impeller 20 is the magnetic field space A1.

Further, the heat transfer device 10 according to the present application has a configuration in which the magnetic field generator 40 can be moved, or a range in which a magnetic field is generated by a plurality of electromagnets is changed between a cooling operation and a heating operation, thereby performing cooling operation and heating. It can also be applied to the air conditioner 1 that can switch between operation and operation.

The magnetic field generator 40 shown in the figure according to the above-described embodiment was arranged only on the lower surface of the casing 30. However, the figure schematically shows the heat transfer device 10, and the invention disclosed in the present specification is not limited to this. That is, the magnetic field generator 40 may cover the entire magnetic field space A1.

Furthermore, the present invention is not limited to the above-described embodiment as long as it conforms to the gist of the invention described in the claims. Therefore, at least two of the plurality of embodiments described above may be combined.

1 ... Air conditioner 3 ... Indoor heat exchanger 5 ... Outdoor heat exchanger 10 ... Heat transfer device 20 ... Impeller 21 ... Blade 22 ... Space 23 ... Partition material 23A ... Magnetic material 24 ... Electric motor 30 ... Casing 31 ... Pump room 32 ... Heat absorption side suction part 33 ... Heat dissipation side suction part 34 ... Heat absorption side discharge part 34A ... Heat absorption side discharge port 35 ... Heat dissipation side discharge part 35A ... Heat dissipation side discharge port 36 ... Partition member 40 ... Magnetic field generator

Claims (1)

In a heat transfer device that transfers heat on the endothermic side to the heat dissipation side
An impeller that is at least partially made of a magnetic material and has a plurality of blades extending radially outward from the center of rotation.
A casing that constitutes a pump chamber that rotatably stores the impeller, and
An endothermic side suction unit provided in the casing for guiding the heat transfer fluid that has absorbed heat on the endothermic side to the rotation center side of the impeller.
A heat-dissipating suction unit provided on the casing and for guiding the heat-conveying fluid that has released heat on the heat-dissipating side to the rotation center side of the impeller.
An endothermic side discharge portion provided on the casing for discharging the heat transfer fluid flowing out from the radial outside of the impeller with the rotation of the impeller to the endothermic side.
A heat-dissipating side discharge portion provided in the casing for discharging the heat-conveying fluid flowing out from the radial outside of the impeller with the rotation of the impeller to the heat-dissipating side.
A magnetic field generator that generates a magnetic field in a space communicating with the heat dissipation side discharge portion side of the pump chamber is provided.
When the space in the pump chamber where the magnetic field is formed is defined as the magnetic field space, and the space in the pump chamber in which the magnetic field is not formed is defined as the non-magnetic field space.
The heat dissipation side suction unit is configured so that the heat transfer fluid sucked into the pump chamber flows out to the heat dissipation side discharge unit side via the magnetic field space.
The endothermic side suction unit is configured so that the heat transfer fluid sucked into the pump chamber flows out to the endothermic side discharge unit side via the non-magnetic field space .
It has a partition member that separates the endothermic side suction part and the heat dissipation side suction part.
The inclination angle of the partition member with respect to the boundary line between the magnetic field space and the non-magnetic field space is such that the heat radiating fluid sucked into the pump chamber flows out from the heat radiating side discharge portion and is sucked into the pump chamber. It meets the requirement that the endothermic fluid flow out from the endothermic discharge section.
Further, a heat transfer device including an actuator that changes the tilt angle according to the rotation speed of the impeller.

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